Multiple assembler packs: add experimental memory bus instrumentation.
[openssl.git] / crypto / x86cpuid.pl
index a7464af..0513398 100644 (file)
@@ -307,6 +307,108 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
        &ret    ();
 &function_end_B("OPENSSL_cleanse");
 
+{
+my $lasttick = "esi";
+my $lastdiff = "ebx";
+my $out = "edi";
+my $cnt = "ecx";
+my $max = "ebp";
+
+&function_begin("OPENSSL_instrument_bus");
+    &mov       ("eax",0);
+    if ($sse2) {
+       &picmeup("edx","OPENSSL_ia32cap_P");
+       &bt     (&DWP(0,"edx"),4);
+       &jnc    (&label("nogo"));       # no TSC
+       &bt     (&DWP(0,"edx"),19);
+       &jnc    (&label("nogo"));       # no CLFLUSH
+
+       &mov    ($out,&wparam(0));      # load arguments
+       &mov    ($cnt,&wparam(1));
+
+       # collect 1st tick
+       &rdtsc  ();
+       &mov    ($lasttick,"eax");      # lasttick = tick
+       &mov    ($lastdiff,0);          # lastdiff = 0
+       &clflush(&DWP(0,$out));
+       &lock   ();
+       &add    (&DWP(0,$out),$lastdiff);
+       &jmp    (&label("loop"));
+
+&set_label("loop",16);
+       &rdtsc  ();
+       &mov    ("edx","eax");          # put aside tick (yes, I neglect edx)
+       &sub    ("eax",$lasttick);      # diff
+       &mov    ($lasttick,"edx");      # lasttick = tick
+       &mov    ($lastdiff,"eax");      # lastdiff = diff
+       &clflush(&DWP(0,$out));
+       &lock   ();
+       &add    (&DWP(0,$out),"eax");   # accumulate diff
+       &lea    ($out,&DWP(4,$out));    # ++$out
+       &sub    ($cnt,1);               # --$cnt
+       &jnz    (&label("loop"));
+
+       &mov    ("eax",&wparam(1));
+&set_label("nogo");
+    }
+&function_end("OPENSSL_instrument_bus");
+
+&function_begin("OPENSSL_instrument_bus2");
+    &mov       ("eax",0);
+    if ($sse2) {
+       &picmeup("edx","OPENSSL_ia32cap_P");
+       &bt     (&DWP(0,"edx"),4);
+       &jnc    (&label("nogo"));       # no TSC
+       &bt     (&DWP(0,"edx"),19);
+       &jnc    (&label("nogo"));       # no CLFLUSH
+
+       &mov    ($out,&wparam(0));      # load arguments
+       &mov    ($cnt,&wparam(1));
+       &mov    ($max,&wparam(2));
+
+       &rdtsc  ();                     # collect 1st tick
+       &mov    ($lasttick,"eax");      # lasttick = tick
+       &mov    ($lastdiff,0);          # lastdiff = 0
+
+       &clflush(&DWP(0,$out));
+       &lock   ();
+       &add    (&DWP(0,$out),$lastdiff);
+
+       &rdtsc  ();                     # collect 1st diff
+       &mov    ("edx","eax");          # put aside tick (yes, I neglect edx)
+       &sub    ("eax",$lasttick);      # diff
+       &mov    ($lasttick,"edx");      # lasttick = tick
+       &mov    ($lastdiff,"eax");      # lastdiff = diff
+       &jmp    (&label("loop2"));
+
+&set_label("loop2",16);
+       &clflush(&DWP(0,$out));
+       &lock   ();
+       &add    (&DWP(0,$out),"eax");   # accumulate diff
+
+       &sub    ($max,1);
+       &jz     (&label("done2"));
+
+       &rdtsc  ();
+       &mov    ("edx","eax");          # put aside tick (yes, I neglect edx)
+       &sub    ("eax",$lasttick);      # diff
+       &mov    ($lasttick,"edx");      # lasttick = tick
+       &cmp    ("eax",$lastdiff);
+       &mov    ($lastdiff,"eax");      # lastdiff = diff
+       &mov    ("edx",0);
+       &setne  ("dl");
+       &sub    ($cnt,"edx");           # conditional --$cnt
+       &lea    ($out,&DWP(0,$out,"edx",4));    # conditional ++$out
+       &jnz    (&label("loop2"));
+
+&set_label("done2");
+       &mov    ("eax",&wparam(1));
+       &sub    ("eax",$cnt);
+&set_label("nogo");
+    }
+&function_end("OPENSSL_instrument_bus2");
+}
+
 &initseg("OPENSSL_cpuid_setup");
 
 &asm_finish();